Promise you will but only if Tanya goes first

You lick your lips, tasting that unforgettable cherry lipstick, heart racing as you consider your options. It seems like you're in a no-win situation - if you submit to the gauntlet she's teasing you with you know your chances of getting out of this unfertilized is miniscule, but on the other hand, some part of you rebels against the idea of being **** into taking an unprotected load from your own dad. Maybe with a little teasing, if you play this just right, you can present her with a compromise she won't be willing to take... or, if she does, at least you'll have a little moral victory.

Kissing Tanya some more, you eventually break contact with her intoxicating lips and reach down to finger her from behind. "I'm sorry Tanya... this is a big leap to make all at once." you whisper into her ear. "If it's what you really want me to do, I guess I'll have **** but to take his cock... but there's just one little thing I'd like to ask first, if you do me this little favor now I promise I won't ask for any more."

Tanya's blue eyes look amused, and search your face. "Well, this is certainly new, Princess. Don't think that you're going to get off the hook with another mushy confession of love..." she said with an evil giggle and a pinch of your breast.

"Nooo, even if it really is, um, who you say," you say, your face blushing furiously, "then I wouldn't want to send him away unsatisfied. But just like my first time risking it, I think I might need a little help from you. And right now, I think the best way for you to help would be to show me the best positions for getting fucked through a glory hole, and show me how good his cock is."

Looking a little taken aback by that, Tanya looks both flattered and a little nervous, her eyes flicking to the gloryhole then back to you. "Now now, I went to all the trouble of setting this up for you, Princess..."

You give her damp slit another thrust with your fingers, drawing a little sigh of pleasure out of her. "Come onnnn, Tanya," you say in a sweet, almost bratty voice. "It would be so hot seeing you like that. I'm sure in only a minute I'll be rushing to push you out of the way and take it in me to the hot, creamy end myself. I'll even let you film whatever you do to me next, in case that first round of **** wasn't enough. Besiiiiides, it's like you said, they know to knock on the wall when they're about to cum, right?"

Tanya backed away from you. She was wearing a tight, curve-hugging black backless dress with fishnet stockings and knee-high boots completing the punky look that her short electric blue hair gave her - and the thought of squeezing those massive tits of hers while she was fucking herself on a stranger (or not so stranger) on the other side of that wall was turning you on more than you thought. At last, you thought evilly, you were starting to understand why she was always pushing you into these situations.

Time is running short; you hear a dramatic zip, and a well-sized cock extends itself through the hole, right on schedule. "Well what'll it be Tanya? You could always drag me to the theater but I think this is more fun... if you say you will, I'll start sucking." you say with a debauched yet romantic lick of your lips.

For once, it's Tanya whining and biting her lip in anticipation, though to her credit she still manages to play it cool. "Oh, how naughty of you to spring this on me at the last second like this... I'm going to have to take our games into high gear after this, Princess... but sure. I'll let your hot dad warm up on me before I let you risk getting yourself knocked up on him."

That was all you needed to hear; you're already down on your knees sucking and slurping the thick rod with more enthusiasm than you did any of the half dozen that came before. Surprisingly, Tanya doesn't call time as soon as you expected, just watching you bob up and down on the stranger's shaft energetically - out of the corner of your eye you see she's grinning nervously and crossing and uncrossing her legs. When you feel like about twice as much time as she laid down has elapsed, you give her a smoldering glance, slapping the throbbing hardon against your cheek and moaning lustily.

That's all the encouragement Tanya finally needs to push her over the edge. You take her hand and guide her over, pushing her skirt up over her rump and yanking her thong down to her ankles. No newcomer to all this business, Tanya gives you a sweet smile as she takes hold of the shaft in her hands and traces it up and down her silky-smooth slit, letting the glans slip into her just a tiny bit before pushing it back out, making the cock's owner groan himself with anticipation.

"This is your lucky day, guy," she says to the hole in a sultry tone, looking back over her shoulder. "There are two of us in here, and you'll be getting to fuck both of us right now, totally bareback. She's not on the pill and neither am I. But she's the one who really wants to get her pussy flooded with potent sperm tonight, so, mmm, be sure and give a knock when you feel yourself getting close so that we can switch off again and make sure you get to drop your load in her while she's at the most fertile part of her cycle."

You hear a lusty mumble of assent from the other side of the gloryhole. A giddy excitement floods you as Tanya slides her ample bottom back against the wall, letting the thick cock slide completely into her with a single thrust. She was so wet that it produces a sound like someone stepping in a mud puddle wearing galoshes. "Ahhh!" she squeals in a high pitched voice as she starts bucking her hips against the wall, slamming herself so hard against the gloryhole that the wall starts shaking. The guy on the other side leans in so close that, as you kneel down to start playing with Tanya's breasts and get a better look at the action, you can see and hear his balls starting to slap against her thighs.

"Mmm! Mm! MMMh!" Tanya gasps lustily each time the thick cock bottoms out in her. "Oh Prin..cs... You, unh, don't know what you're missing. The feel of him going as deep as he wants, knowing that he could seed you with one little spasm... Mmmf... and don't forget that the timer doesn't start ticking until you start taking it deep yourself. So, you know, you're just making it more and more likely that he's going to blast it all inside you as soon as you stick it in."

Your only immediate response is to give her tits another squeeze, feeling the way they bounced as she was getting fucked, and stand up, lifting your skirt up and pushing her face into your crotch. Tanya didn't take long at all to start licking once you had her lips perfectly lined up with your pussy, and just like that, she was bouncing between the genitals of two generations, that is, if what she said was true. She was really getting into it too; putting some of her weight on your hips, Tanya lifted up one of her legs and rested her left thigh against the wall, turning to the side so that the 'stranger' could feel another angle of her pussy.

Looking through the gloryhole, you could see that the pair of swinging balls that were slapping up against Tanya's rear were starting to get visibly tense and tight - you'd already lost track of time and so had she.

"Oh, mmmf, yes..." Tanya closed her eyes and panted lustily. "Come on over here and get off this so that you can play the game properly and finish eating me 'til I cum, this is supposed to be your risky fun."

But you can't help but think that she looks really great spearing herself against the gloryhole like that, making her huge rack bounce and sway dramatically with every thrust. She's so overcome by lust that if you were to leave her there for just a few more minutes, you suspect that that guy on the other side might end up losing control sooner than he expected. Especially if you start teasing him about how the girl he's screwing has a fetish for risking getting knocked up. "Tanya," you whisper to her in a low voice, "I really do love you... don't you think it might be nice if we were family?" Her eyes widen at that, momentarily speechless as she realizes that she's in no position to move herself off now, not with you holding her face in with your sopping twat demanding all her spare attention.